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EP0226102A2 - Règle à dessiner avec coulisseau pour élever - Google Patents

Règle à dessiner avec coulisseau pour élever Download PDF

Info

Publication number
EP0226102A2
EP0226102A2 EP86116572A EP86116572A EP0226102A2 EP 0226102 A2 EP0226102 A2 EP 0226102A2 EP 86116572 A EP86116572 A EP 86116572A EP 86116572 A EP86116572 A EP 86116572A EP 0226102 A2 EP0226102 A2 EP 0226102A2
Authority
EP
European Patent Office
Prior art keywords
rule
slider
fact
raising
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP86116572A
Other languages
German (de)
English (en)
Other versions
EP0226102A3 (fr
Inventor
Giovanni Sala
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MICRON SNC di Renato Donati e Giovanni Sala
Original Assignee
MICRON SNC di Renato Donati e Giovanni Sala
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MICRON SNC di Renato Donati e Giovanni Sala filed Critical MICRON SNC di Renato Donati e Giovanni Sala
Publication of EP0226102A2 publication Critical patent/EP0226102A2/fr
Publication of EP0226102A3 publication Critical patent/EP0226102A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L7/00—Straightedges

Definitions

  • This invention relates to improvements on draw­ing rules and refers in particular to a rule for universal drafting devices provided with a rising slider for raising and detaching the lateral edges of the rule from the sheet of drawing paper so as to enable it to be used both for drawings in pencil and in ink.
  • the scope of this invention is to provide a draw­ing rule which is provided with an edge raising device which is either built into or forms part of the rule itself, and which can be easily operated in order to use the same rule for carry­ing out either pencil or ink drawings, with­out having to continually fit and/or remove extra parts, or remove and turn the rule over.
  • a further scope of this invention is to provide a rule as described above, by means of which it is possible in each case to adjust and to vary the distance of the lateral edges from the surface of the drawing sheet, according to the various requirements and without changing any part of the rule itself.
  • a still further scope of this invention is to provide a rule for universal drafting devices, with a device for raising the lateral edges in order to carry out pencil and/or ink drawings, said device being adaptable for rules of differ­ent lengths.
  • a drawing rule comprising a manually operable device for rais­ing the lateral edges with respect to the sur­face of a drawing sheet
  • the raising device comprises a longitudinally movable slider underneath the rule itself, said slider compris­ing at least one raising head provided on the end of an elastically flexible arm, and guide means for guiding said slider and for shifting said raising head from a first operative position in which the raising head is completely retracted with respect to the back plane defined by the lateral edges of the rule, so as to enable it to be used for carrying out pencil drawings, to a second operative position in which the raising head is partially protruding from the aforesaid back plane.
  • Figures 1 and 2 and the subsequent views and cross-sectional view of figures 3 to 10 show a first embodiment of a drawing rule incorporat­ing the raising device according to this inven­tion.
  • the rule 10 comprises a main central portion 11 with millimetric fins 12 whose lateral edges 12a, along which the pencil point or ink pen is made to slide, define a back plane 13 (fig. 3) destined to coincide or come to rest parallel with and at a short distance from the surface of a drawing sheet, according to whether the drawing is carried out in pencil or in ink.
  • the lateral fins 12 have been shown as separate parts secured to the central part 11 of the rule, however it is obvious that the rule could also be made in one piece.
  • the rule comprises a manually-actuable raising slider means in order to vary and adjust the distance of the lateral edges 12a of the rule from the surface of the drawing sheet.
  • the device in question comprises a slider 14 in the form of an elasti­cally flexible arm, which runs along a longi­ tudinal guide slot 15 provided below or to the rear of the central part 11 of the rule.
  • the slider 14 is provided with a raising head 16 running along lateral cam surfaces 17 which, in the case of a slider with one or more heads, are slanted and all facing in the same direction.
  • the longitudinal slot 15 for guiding the slider 14 has a flat bottom 15a, and flat side walls 15b which are provided, in a suitable position, with cams 17.
  • each cam 17 is defined by a sloping surface 17a, which forms a small angle of a few degrees with res­pect to the main plane 13 of the rule, and a flat side surface 17b parallel to the sliding direction of the slider, for guiding the raising head 16.
  • the sloping surface 17a and the corres­ponding flat side surface 17b start from a point slightly further in or higher than the bottom of the slider-guide slot 15 and extend in the same longitudinal direction and down­wards, that is to say, towards the main back plane 13 of the rule, for a distance and with a slope calculated to allow the raising head 16 to shift from a first completely retracted position (figs. 8 and 10) in which the rule rests with its edges 12a directly on the sur­ face 18 of the drawing sheet, to a protruding position (figs. 9 and 10) in which the head 16 rests on the surface 18, thereby keeping the edges 12a of the rule raised with respect to the aforesaid surface 18.
  • the slider 14 is manual­ly actuable from the upper part of the rule: the slider 14 is connected to a control button 19 by means of a screw 21 which passes through a hole in the slider 14 and screws into a match­ing hole in a shank 20 on the control button.
  • the shank 20 is elongated in shape and runs along an elongated slot 22 in the central part 11 of the rule, said slot 22 being longer than the shank 20 in order to define both the working stroke for the raising heads of the slider, and a stop in the two extreme operative positions.
  • the rule 10 comprises a raising slider 14 provided with two raising heads 16, one at each end, which are moved simul­ taneously by means of a single control button; it is obvious however that, within the above described inventive principle, other solutions are possible: for example, the slider could be provided with a single raising head, in which case it would be expedient to provide the rule with two or more sliders with independent con­trol buttons or, in the case of particularly long rules, the slider could be provided with a larger number of heads and namely, two end heads and one or more intermediate heads. This latter solution is shown in the example in fi­gure 11.
  • the rule 10 comprises a central part 11 with a longi­tudinal guide 15 on the lower portion, in which a slider 14 moves.
  • the slider 14 is provided at the ends with two raising heads 16 with the relative lateral cams 17, as well as two inter­mediate raising heads 16a each of which is con­nected to a respective flexible arm 14a dis­posed parallel and complanate with the slider 14; the heads protrude laterally and in the case of the intermediate heads 16a only one cam 17 is provided; the two intermediate heads are situated on the two opposing edges of the slider 14, on opposite sides of the control button, so as to symmetrically support the rule.
  • the cams 17 of the raising heads 16a must all face and slope in the same direc­tion.
  • the invention refers to a new drawing rule and, in particular, to a rule for universal drafting devices, suitable for carry­ing out drawings in pencil and in ink, in which, by simply shifting a manually-operable slider located on the upper side of the rule, in a longitudinal direction, it is possible to raise and lower the lateral edges with respect to the surface of the drawing sheet.
  • the raising head has a flat surface which runs along a sloping plane defined by one or two lateral cams 17, however the disposition could also be reversed by pro­viding a wedge-shaped head, or with a gradually variable thickness, whose lower sloping surface, or in which lateral sloping surfaces, run along a projecting surface or ledge beneath the cen­ tral part of the rule, thereby obtaining cam means for guiding and shifting the raising heads, wholly similar or equivalent to those previous­ly illustrated.
EP86116572A 1985-12-06 1986-11-28 Règle à dessiner avec coulisseau pour élever Withdrawn EP0226102A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT23120/85A IT1186407B (it) 1985-12-06 1985-12-06 Riga da disegno con cursore di sollevamento dal piano del foglio di disegno
IT2312085 1985-12-06

Publications (2)

Publication Number Publication Date
EP0226102A2 true EP0226102A2 (fr) 1987-06-24
EP0226102A3 EP0226102A3 (fr) 1987-11-25

Family

ID=11204004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116572A Withdrawn EP0226102A3 (fr) 1985-12-06 1986-11-28 Règle à dessiner avec coulisseau pour élever

Country Status (2)

Country Link
EP (1) EP0226102A3 (fr)
IT (1) IT1186407B (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR900735A (fr) * 1943-12-20 1945-07-06 Règle pour table ou planche à dessin
FR980410A (fr) * 1948-12-13 1951-05-11 Perfectionnements apportés aux règles de dessinateur

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR900735A (fr) * 1943-12-20 1945-07-06 Règle pour table ou planche à dessin
FR980410A (fr) * 1948-12-13 1951-05-11 Perfectionnements apportés aux règles de dessinateur

Also Published As

Publication number Publication date
IT8523120A0 (it) 1985-12-06
EP0226102A3 (fr) 1987-11-25
IT1186407B (it) 1987-11-26

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Inventor name: SALA, GIOVANNI